CN203617905U - Booster circuit - Google Patents
Booster circuit Download PDFInfo
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- CN203617905U CN203617905U CN201320646527.2U CN201320646527U CN203617905U CN 203617905 U CN203617905 U CN 203617905U CN 201320646527 U CN201320646527 U CN 201320646527U CN 203617905 U CN203617905 U CN 203617905U
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- 238000001914 filtration Methods 0.000 claims abstract description 38
- 238000004146 energy storage Methods 0.000 claims description 10
- 241001125929 Trisopterus luscus Species 0.000 claims description 4
- 238000005538 encapsulation Methods 0.000 claims description 3
- 229910052715 tantalum Inorganic materials 0.000 claims description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 description 32
- 239000004065 semiconductor Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
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Abstract
The utility model relates to the technical field of electronic circuits, in particular to a DC-DC booster circuit. The booster circuit consists of a pre-filtering unit, a voltage dividing unit, a soft-start unit, an inverter unit, an output filter unit and an output instruction unit. The booster circuit with reasonable circuit structure uses soft-starting mode avoiding the strike to the power supply at the moment of connecting with the power supply and protecting the power supply. Taking advantage of the pre-filtering unit and the output filter unit filtering at the input end and the output end of the circuit at the same time to decrease the alternating current pulse ripple coefficient and then to achieve the smooth direct current power supply voltage, the circuit's green light emitting diode of the output indicator unit is light in normal times, improving the convenience of application.
Description
Technical field
The utility model relates to electronic circuit technology field, particularly a kind of DC-DC booster circuit.
Background technology
In current miniature instrument meter electronics product, the application of DC-DC booster circuit is very general; general boost chip or the single-chip microcomputer cooperation peripheral circuit composition of adopting more; this scheme circuit is to meet the higher electronic product of stability requirement often to need separately to join a block power supply baffle; cause circuit structure comparatively complicated, circuit volume is relatively large and cost is higher.
Summary of the invention
For addressing the above problem, it is a kind of simple in structure that the purpose of this utility model is to provide, and circuit volume is little, a kind of booster circuit of band output prompting.
The utility model solves the technical scheme that its technical problem adopts: be made up of pre-filtering unit, partial pressure unit, soft start unit, inversion unit, output filtering unit and output indicating member; Described pre-filtering unit comprises and after input DC power and capacitor C 4 and capacitor C 5 are connected in parallel, forms feeder ear A after filtering, ground connection after capacitor C 4 is connected with capacitor C 5 negative pole pin; Described partial pressure unit comprises after filtering that feeder ear A and resistance R 1, resistance R 2 are connected in series rear ground connection; Described soft start unit comprises after filtering that feeder ear A and capacitor C 2, resistance R 5 are connected in series rear ground connection; Described inversion unit comprises the DC-DC chip U1 that boosts, boost clk/sel pin, the ain pin of chip U1 of DC-DC is all electrically connected with feeder ear A after filtering, ground connection after ref pin is connected with capacitor C 3, on pin is connected between the capacitor C 2 and resistance R 6 of soft start unit; Pokin pin is connected between the resistance R 1 and resistance R 2 of partial pressure unit; The boost lxn pin of chip U1 of DC-DC is connected Hou Yi road and is connected with energy storage inductor L1 one end with lxp pin, the energy storage inductor L1 other end is connected to after filtering between feeder ear A, green LED LED; Another road is connected with the anodal pin of diode D1, and diode D1 negative pole pin and resistance R 3, capacitor C 1 are connected in series rear ground connection; The boost out pin of chip U1 of DC-DC is connected between resistance R 3 and capacitor C 1, and pout pin is connected between diode D1 and resistance R 3, forms the voltage output end B after boosting.Described output filtering unit comprise voltage output end B be connected in parallel with capacitor C 6, capacitor C 7 respectively after ground connection.Described output indicating member comprises that voltage output end B and green LED LED, resistance R 4 are connected in series rear ground connection.
The utility model compared with prior art has the following advantages and beneficial effect: in the utility model circuit, the element such as resistance, electric capacity is all the element that adopts patch-type, can effectively reduce circuit volume, reduces costs.The utility model circuit structure is reasonable, adopts soft starting mode can prevent the impact of power supply access moment to power supply, protection power source.Utilize pre-filtering unit and output filtering unit to carry out filtering at circuit input end and output, thereby obtain level and smooth DC power supply voltage to reduce interchange pulse ripple coefficient simultaneously.When circuit is normal, the green LED of its output indicating member is lighted, and has improved the convenience of application.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further illustrated.
With reference to Fig. 1, the utility model is made up of pre-filtering unit, partial pressure unit, soft start unit, output indicating member, inversion unit and output filtering unit.
Pre-filtering unit comprises and after input DC power Vin and capacitor C 4 and capacitor C 5 are connected in parallel, forms feeder ear A after filtering, ground connection after capacitor C 4 is connected with capacitor C 5 negative pole pin.Pre-filtering unit adopts capacitor C 4 structure in parallel with capacitor C 5, has improved the reliability of circuit working, if having after a capacitance open circuit, another electric capacity still can carry out filtering, and circuit still can be worked, and effectively prevents serious AC fault.
Partial pressure unit comprises after filtering that feeder ear A and resistance R 1, resistance R 2 are connected in series rear ground connection.
Soft start unit comprises after filtering that feeder ear A and capacitor C 2, resistance R 5 are connected in series rear ground connection.When input DC power place in circuit; by resistance R 5, capacitor C 2 is charged; DC-DC boosts on the on pin of chip U1 after voltage is gradually varied to 0; the DC-DC chip U1 that boosts is activated into operating state; avoid the moment of power supply access excessive to the impact of DC power supply, realize protection input DC power object.
Inversion unit comprises the DC-DC chip U1 that boosts, and boost clk/sel pin, the ain pin of chip U1 of DC-DC is all electrically connected with feeder ear A after filtering, ground connection after ref pin is connected with capacitor C 3, and on pin is connected between the capacitor C 2 and resistance R 6 of soft start unit; Pokin pin is connected between the resistance R 1 and resistance R 2 of partial pressure unit; The boost lxn pin of chip U1 of DC-DC is connected Hou Yi road and is connected with energy storage inductor L1 one end with lxp pin, the energy storage inductor L1 other end is connected to after filtering between feeder ear A, green LED LED; Another road is connected with the anodal pin of diode D1, and diode D1 negative pole pin and resistance R 3, capacitor C 1 are connected in series rear ground connection; The boost out pin of chip U1 of DC-DC is connected between resistance R 3 and capacitor C 1, and pout pin is connected between diode D1 and resistance R 3, forms the voltage output end B after boosting.Output filtering unit comprise voltage output end B be connected in parallel with capacitor C 6, capacitor C 7 respectively after ground connection.Output indicating member comprises that voltage output end B and green LED LED, resistance R 4 are connected in series rear ground connection.When DC-DC boosts after the built-in metal-oxide-semiconductor closure of chip U1, energy storage inductor L1 converts electrical energy into magnetic field energy and stores, diode D1 plays buffer action, and when DC-DC boost the built-in metal-oxide-semiconductor of chip U1 disconnect after energy storage inductor L1 the magnetic field energy of storage is converted to electric energy, the voltage that is voltage output end B is that the stack that the magnetic figured stone of input DC power voltage Vin and energy storage inductor L1 can be converted to electric energy forms afterwards, therefore output voltage V out is higher than input voltage, complete the process of boosting, the output filtering unit forming through the capacitor C 6 by being connected in parallel and capacitor C 7 again, filter AC ripple, the direct voltage Vout of stable output.
The DC-DC chip U1 that boosts adopts the chip MAX1703 that boosts of Maxim, this built-in chip type metal-oxide-semiconductor, diode D1 adopts operating current to be greater than the HF schottky diode of 1A, as SS34 model diode, to guarantee boosting the built-in metal-oxide-semiconductor of chip U1 while turn-offing as DC-DC, energy storage inductor L1 can provide enough large electric current to resistance R 3 and capacitor C 1 fast.Capacitor C 4 and capacitor C 6 adopt the paster tantalum electric capacity of 7343 encapsulation, and capacitor C 5 is the high frequency capacitance of 1206 encapsulation with capacitor C 7.
When use, input DC power is after the power supply of pre-filtering unit filtering, after partial pressure unit dividing potential drop, receive the boost pokin pin of chip U1 of DC-DC, DC-DC boosts after chip U1 startup, by pout pin output low level, green LED LED lights, and after representing to boost, generating normally, has improved the convenience of application.
Claims (4)
1. a booster circuit, is characterized in that being made up of pre-filtering unit, partial pressure unit, soft start unit, inversion unit, output filtering unit and output indicating member;
Described pre-filtering unit comprises and after input DC power and electric capacity (C4) and electric capacity (C5) are connected in parallel, forms feeder ear A after filtering, ground connection after electric capacity (C4) is connected with electric capacity (C5) negative pole pin;
Described partial pressure unit comprises after filtering that feeder ear A and resistance (R1), resistance (R2) are connected in series rear ground connection;
Described soft start unit comprises after filtering that feeder ear A and electric capacity (C2), resistance (R5) are connected in series rear ground connection;
Described inversion unit comprises the DC-DC chip (U1) that boosts, boost clk/sel pin, the ain pin of chip (U1) of DC-DC is all electrically connected with feeder ear A after filtering, ground connection after ref pin is connected with electric capacity (C3), on pin is connected between the electric capacity (C2) and resistance (R6) of soft start unit; Pokin pin is connected between the resistance (R1) and resistance (R2) of partial pressure unit; The boost lxn pin of chip (U1) of DC-DC is connected Hou Yi road and is connected with energy storage inductor (L1) one end with lxp pin, energy storage inductor (L1) other end is connected between feeder ear A after filtering, green LED (LED); Another road is connected with the anodal pin of diode (D1), and diode (D1) negative pole pin and resistance (R3), electric capacity (C1) are connected in series rear ground connection; The boost out pin of chip (U1) of DC-DC is connected between resistance (R3) and electric capacity (C1), pout pin is connected between diode (D1) and resistance (R3), forms the voltage output end B after boosting;
Described output filtering unit comprise voltage output end B be connected in parallel with electric capacity (C6), electric capacity (C7) respectively after ground connection,
Described output indicating member comprises that voltage output end B and green LED (LED), resistance (R4) are connected in series rear ground connection.
2. a kind of booster circuit according to claim 1, is characterized in that: described DC-DC boosts, and can to adopt model be the MAX1703 chip that boosts to chip (U1).
3. a kind of booster circuit according to claim 1, is characterized in that: described diode (D1) adopts operating current to be greater than the HF schottky diode of 1A.
4. a kind of booster circuit according to claim 1, is characterized in that: described electric capacity (C4) adopts the 7343 paster tantalum electric capacity that encapsulate with electric capacity (C6), and electric capacity (C5) is the high frequency capacitance of 1206 encapsulation with electric capacity (C7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320646527.2U CN203617905U (en) | 2013-10-21 | 2013-10-21 | Booster circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320646527.2U CN203617905U (en) | 2013-10-21 | 2013-10-21 | Booster circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203617905U true CN203617905U (en) | 2014-05-28 |
Family
ID=50770524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320646527.2U Expired - Fee Related CN203617905U (en) | 2013-10-21 | 2013-10-21 | Booster circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203617905U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113141103A (en) * | 2021-04-27 | 2021-07-20 | 微山县微山湖微电子产业研究院有限公司 | Voltage conversion circuit |
-
2013
- 2013-10-21 CN CN201320646527.2U patent/CN203617905U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113141103A (en) * | 2021-04-27 | 2021-07-20 | 微山县微山湖微电子产业研究院有限公司 | Voltage conversion circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140528 Termination date: 20181021 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |